WO2014034901A1

WO2014034901A1 - Wire harness

Info

Publication number: WO2014034901A1
Application number: PCT/JP2013/073441
Authority: WO
Inventors: 伸一稲尾; 英臣足立; 小久江　健; 達也雄鹿; 和晃勝呂; 佳昭尾崎; 博之吉田
Original assignee: 矢崎総業株式会社
Priority date: 2012-09-03
Filing date: 2013-08-30
Publication date: 2014-03-06
Also published as: US20150179300A1; US9412491B2; CN104604059B; EP2894738A1; JP5957783B2; CN104604059A; EP2894738B1; JP2014050262A; EP2894738A4

Abstract

A shape modifying section (23) includes a small tube section (28) having a housing space (27), a tube continuous section (29) having one end continuous with an end of the small tube section (28), and a large tube section (30) which is continuous with the other end of the tube continuous section (29) and which has a tubular shape having an outer shape larger than that of the small tube section (28).

Description

Wire harness

The present invention relates to a wire harness including at least one conductive path and a tubular-shaped exterior member covering the conductive path.

Generally, a battery of a hybrid vehicle or an electric vehicle and an inverter unit are electrically connected by a high-voltage (ie, high-voltage) wire harness. The wire harness disclosed in the following Patent Document 1 includes a high-voltage electric wire serving as a high-voltage conductive path and an exterior member that accommodates the high-voltage electric wire.

Japanese Unexamined Patent Publication No. 2004-224156

The conventional technology has several problems related to heat as follows. That is, when the occupation ratio of the conductive path in the exterior member is low, the conductive path has few contact points with the inner surface of the exterior member. Moreover, in the location where a conductive path and the inner surface of an exterior member do not contact, since the distance from the inner surface of the exterior member of a conductive path becomes large, the heat which arises in a conductive path cannot be effectively transmitted to an exterior member. For these reasons, the conventional technology cannot provide a sufficient heat dissipation effect.

Also, part of the wire harness in the longitudinal direction may be routed near heat sources such as exhaust pipes, exhaust manifolds, engines, and motors. In this case, the exterior member that covers the part is directly exposed to the heat from the heat source, which may affect the conductive path accommodated in the exterior member.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wire harness that can enhance the heat dissipation effect and can be made less susceptible to external thermal influences.

In order to solve the above-described problems, a wire harness according to the present invention is characterized by the following (1) to (4).
(1) A wire harness including at least one conductive path and a tubular-shaped exterior member covering the conductive path,
The exterior member has a shape changing portion in at least one place
The shape changing portion includes at least a small tube portion having an accommodation space necessary for accommodating the conductive path, a continuous tube portion having one end continuous with the end portion of the small tube portion, and a continuous tube portion continuous with the other end. And a large tube portion having a tubular shape whose outer shape is larger than that of the small tube portion.

(2) The wire harness of (1) above,
In the shape changing portion, the outer peripheral surface length of the small tube portion is shorter than the outer peripheral surface length of the large tube portion.

(3) The wire harness according to (1) or (2) above,
The exterior member is made of resin.

(4) The wire harness according to (1) or (2) above,
The exterior member is made of metal.

The wire harness of the above (1) has a shape changing portion in at least a part of the exterior member, and the shape changing portion includes a small tube portion, a tubular body continuous portion, and a large tube portion. For this reason, the occupation ratio of the conductive path can be increased in the small pipe portion. As a result, the heat generated in the conductive path can be efficiently absorbed by the small tube portion, and the absorbed heat can be radiated from the small tube portion. Therefore, the heat dissipation effect can be enhanced compared to the conventional case.

Moreover, according to the wire harness of said (1), since an exterior member has a shape change part containing a small pipe part, a tubular body continuous part, and a large pipe part, the small pipe part of a shape change part is match | combined with a heat source. If it arrange | positions, the distance of an exterior member and a heat-generation source can be earned, and it can be made hard to receive the heat influence from the outside.

The wire harness (2) has the following effects in addition to the effect (1). That is, by reducing the length of the outer peripheral surface of the small tube portion, the surface area of the small tube portion can be made smaller than that of the large tube portion, and the surface area can be reduced as compared with the case of being crushed. Therefore, since the small pipe portion having such a small surface area is made to correspond to the heat generation source, it can be made difficult to be affected by the heat from the outside.

According to the wire harness of the above (3), the following effects can be obtained in addition to the effects of the above (1) or (2). That is, a wire harness can be comprised with the exterior member using the characteristic of resin.

According to the wire harness of the above (4), in addition to the effect of the above (1) or (2), the following effects can be obtained. That is, a wire harness can be comprised with the exterior member using the characteristic of the metal.

FIG. 1 is a schematic diagram illustrating a wiring state of the wire harness according to the first embodiment. FIG. 2 is a configuration diagram of the wire harness of FIG. FIG. 3 is a vertical cross-sectional view of a portion indicated by an arrow A in FIG. FIG. 4 is an enlarged view of a portion indicated by an arrow B in FIG. FIG. 5 is a cross-sectional view taken along the line CC of FIGS. FIG. 6 is a cross-sectional view of the wire harness according to the second embodiment. FIG. 7 is a cross-sectional view of the exterior member according to the third embodiment. FIG. 8 is a cross-sectional view of the exterior member according to the fourth embodiment.

The wire harness according to the embodiment includes an exterior member having a portion having a large outer circumference and a portion having a small outer circumference, or an exterior member having a large diameter portion and a small diameter portion, and such an exterior member. At least one conductive path housed in the housing.
<Embodiment 1>

Hereinafter, Embodiment 1 will be described with reference to FIGS. FIG. 1 is a schematic diagram illustrating a wiring state of the wire harness according to the first embodiment. 2 is a configuration diagram of the wire harness of FIG. 1, FIG. 3 is a longitudinal sectional view of an arrow A portion of FIG. 2, FIG. 4 is an enlarged view of an arrow B portion of FIG. It is CC sectional view taken on the line.

Embodiment 1 describes an example in which the present invention is applied to a wire harness routed in a hybrid vehicle (which may be an electric vehicle or a general vehicle).

In FIG. 1, reference numeral 1 indicates a hybrid vehicle. The hybrid vehicle 1 is a vehicle that mixes and drives the two powers of the engine 2 and the motor unit 3. Electric power from a battery 5 (in other words, a battery pack) is supplied to the motor unit 3 via the inverter unit 4. The engine 2, the motor unit 3, and the inverter unit 4 are mounted in the engine room 6 at a position close to the front wheels and the like in this embodiment. Further, the battery 5 is mounted on the rear part 7 of the automobile close to the rear wheels. The battery 5 may be mounted in an automobile room that exists behind the engine room 6.

The motor unit 3 and the inverter unit 4 are electrically connected by a high-voltage wire harness 8. The battery 5 and the inverter unit 4 are also electrically connected by a high-voltage wire harness 9. The intermediate portion 10 of the wire harness 9 is routed under the vehicle floor 11. Further, the wire harness 9 is routed substantially parallel along the vehicle floor 11. The vehicle underfloor 11 is a known body and a so-called panel member, and a through hole (not shown) is formed at a predetermined position. The wire harness 9 is inserted through the through hole.

The wire harness 9 and the battery 5 are electrically connected via a junction block 12 provided in the battery 5. The rear end 13 of the wire harness 9 is electrically connected to the junction block 12 by a known method. The front end 14 side of the wire harness 9 is electrically connected to the inverter unit 4 by a known method.

The motor unit 3 includes a motor (not shown) and a generator (not shown) in its configuration. The inverter unit 4 includes an inverter (not shown) and a converter (not shown). The motor unit 3 is formed as a motor assembly including a shield case (not shown). The inverter unit 4 is also formed as an inverter assembly including a shield case (not shown). The battery 5 is of Ni-MH type or Li-ion type and is modularized. It is also possible to use a power storage device such as a capacitor. The battery 5 is not particularly limited as long as it can be used for the hybrid vehicle 1 and the electric vehicle.

Hereinafter, the configuration and structure of the wire harness 9 will be described. The wire harness 9 is provided as a high-voltage member for electrically connecting the inverter unit 4 and the battery 5 as described above.

In FIG. 2, the wire harness 9 includes an exterior member 15, at least one high-voltage conductive path 16 (that is, a conductive path) that is covered and protected by the exterior member 15, and a terminal 17 of the high-voltage conductive path 16. The shield connector 19 provided in the wire harness terminal part 18 containing the electromagnetic shield member 20 (refer FIG. 5) is included. The electromagnetic shield member 20 is included in the configuration of the high-voltage conductive path 16 in the first embodiment. This will be described later.

The exterior member 15 is a tubular member for accommodating and protecting the high-voltage conductive path 16, and includes a bent tube portion 21, a non-bent tube portion 22, and a shape changing portion 23. The resin is molded so as to be substantially linear. In the first embodiment, the exterior member 15 is made of resin, but is not limited thereto, and may be made of metal.

The bent pipe portion 21 becomes a bent portion when the wire harness 9 is transported or routed, and the non-bent pipe portion 22 continues to the bent pipe portion 21. The non-bending tube portion 22 is provided as a portion that does not bend (in other words, is difficult to bend). The bending pipe part 21 and the non-bending pipe part 22 are formed by being respectively arranged at positions and lengths according to the mounting shape (in other words, the routing shape) with respect to the vehicle (that is, the mounting target). The bending tube portion 21 and the non-bending tube portion 22 are formed so that their cross-sectional shapes match. That is, the non-bending tube portion 22 is formed to have a circular cross section if the bending tube portion 21 has a circular cross section, and a substantially rectangular shape if the bending tube portion 21 has a substantially rectangular shape.

Regarding the bent pipe part 21 and the non-bent pipe part 22, in the first embodiment, a plurality of examples will be described, but the number is not particularly limited. That is, the bending pipe part 21 may be integrated into one and the non-bending pipe parts 22 may be continuously formed on both sides. Alternatively, one non-bending tube portion 22 may be formed and one bending tube portion 21 may be continuously formed on both sides.

The shape changing portion 23 is formed by being arranged in at least one place of the exterior member 15. In the first embodiment, it is formed by being arranged on the non-bending tube portion 22. In addition, the non-bending pipe part 22 exists in what the shape change part 23 exists, and the thing which does not exist.

As will be described later, a plurality of shape changing portions 23 are formed in order to enhance the heat dissipation effect. In addition, the shape changing portion 23 is also formed to increase the distance from the heat source 24. In the first embodiment, one heat source 24 is illustrated, but the number is not limited to this, and a plurality of heat sources 24 may be provided. The heat source 24 in FIGS. 2 and 4 is, for example, the engine 2 (see FIG. 1), an exhaust manifold, or the like (in addition, the engine 2, the motor unit 3, or the like is also included).

The exterior member 15 will be described in more detail.

The bending tube portion 21 is formed in a bellows tube shape having alternately and continuously extending recesses and projections extending in the circumferential direction. The length of the bending pipe portion 21 is set according to the bending range. The bending tube portion 21 is formed in a bendable portion having flexibility (in other words, flexibility). The bending pipe portion 21 is formed in the same portion as the known corrugated tube in the first embodiment. In addition, the bending pipe part 21 shall not be limited to the said bellows pipe shape, if it is a shape which can be bent.

Since the exterior member 15 has the same shape as the corrugated tube as described above, it can be regarded as a “cortube” or a “partially formed corrugated tube”.

The non-bending tube portion 22 has a non-bending tube portion main body 25. The non-bent tube portion main body 25 is formed as a portion that does not bend during transportation or route routing as described above. In addition, the part which does not bend means the part which does not give flexibility positively. The non-bending tube portion main body 25 is formed in a straight tube shape having a circular cross section at a portion not having the shape changing portion 23. In addition, the non-bending pipe part main body 25 is not limited to a circular cross section, and may be an ellipse, an oval, or a substantially rectangular shape. A portion corresponding to the shape changing portion 23 in the non-bending tube portion main body 25 is formed in the same circular cross section as the non-bending tube portion main body 25. The shape is not limited to a circular shape, and may be an oval shape, an oval shape, or a substantially rectangular shape.

The non-bending tube portion main body 25 is formed to be thin so as to have a minimum necessary thickness for having a predetermined strength. In addition to the shape changing portion 23, the non-bending tube portion main body 25 may be formed with a portion that increases rigidity, a portion that ensures chipping resistance, and the like.

The exterior member 15 is formed in a shape in which no slit is provided along the tube axis direction (in other words, there is no stomach split). The reason for not providing the slit is to ensure rigidity and strength. Moreover, the point which aims at the improvement of waterproofness by preventing permeation of moisture is also mentioned. Further, for example, the high-voltage conductive path 16 does not protrude at the bent portion.

The exterior member 15 has an underbending non-bending pipe portion 26 that is routed to the vehicle underfloor 11 (see FIG. 1) as the non-bending pipe portion 22. The unbending pipe portion 26 for underfloor is formed in a long shape because it is routed in the vehicle underfloor 11 (for example, routed along the lean hose).

2 and 4, the shape changing portion 23 is formed as a portion where the length of the outer circumference of the exterior member 15 changes or as a portion having a large diameter and a small diameter. In order to form as such a part, the shape changing part 23 includes at least a small pipe part 28 having an accommodation space 27 necessary for accommodating the high-voltage conductive path 16, and a tubular body having one end continuous with both ends of the small pipe part 28. It has the continuous part 29 and the large pipe part 30 which has a tubular body shape which is continuous with the other end of the tubular body continuous part 29 and has a larger outer shape than the small pipe part 28.

The small pipe portion 28 is formed so that the occupation ratio of the high-voltage conductive path 16 is increased. Specifically, it is formed such that the distance from the inner surface of the small tube portion 28 is shorter than that of the large tube portion 30 at a location where the high voltage conductive path 16 does not contact.

Since the small pipe portion 28 is formed so that the occupation ratio of the high-voltage conductive path 16 is increased as described above, it has a function as a portion that absorbs heat generated in the high-voltage conductive path 16. Moreover, since it is a part which absorbs heat, it also has the function of making it easy to discharge | release the absorbed heat via an outer surface. As can be seen from the shape of the small tube portion 28, in addition to the above, it also has a function as a portion that suppresses fluttering of the high-voltage conductive path 16.

The accommodating space 27 of the small pipe portion 28 is formed in a size that does not hinder the insertion of the high-voltage conductive path 16 when the wire harness 9 is manufactured. When the high-voltage conductive path 16 is inserted into the housing space 27, the high-voltage conductive path 16 comes into contact with the lower side of the small pipe portion 28 by its own weight as shown in FIG. A slight gap is formed on the upper side of the high-voltage conductive path 16 and on the left and right (not shown).

The large pipe part 30 is the non-bending pipe part main body 25 itself. In other words, a part of the non-bending pipe part main body 25 corresponds to the large pipe part 30. Naturally, the large pipe portion 30 is formed with an outer diameter dimension that is normally set as the exterior member 15 with respect to the diameter of the high-voltage conductive path 16.

Assuming that the length in the direction of arrow D is the outer peripheral surface length of the large pipe portion 30, the outer peripheral surface length of the large pipe portion 30 (that is, the length in the direction of arrow D in FIG. 3) is the outer peripheral surface of the small pipe portion 28. It is longer than the length (that is, the length in the direction of arrow E in FIG. 3) (that is, the outer peripheral surface length of the small tube portion 28 is shorter than the outer peripheral surface length of the large tube portion 30). Accordingly, in terms of surface area, the large pipe portion 30 is larger than the small pipe portion 28.

In the small pipe portion 28, since the surface area is small and the distance from the heat source 24 (see FIG. 2) is not the distance F but the distance G as shown in FIG. It is hard to receive.

As shown in FIG. 3, the formation range H of the small pipe portion 28 is set as a sufficient range in consideration of a portion that absorbs heat generated in the high-voltage conductive path 16. Moreover, it is set also to the range according to the magnitude | size of the heat generation source 24 (refer FIG. 2). In addition, the formation range I of the tube continuous part 29 is arbitrary. The longer the formation range I, the gentler the inclination of the continuous tube portion 29, and the shorter the formation range I, the harder the inclination. The formation range I is preferably set in consideration of the insertion work of the high-voltage conductive path 16.

Since the exterior member 15 is made of resin in the first embodiment, the shape changing portion 23 is resin-molded so as to narrow the non-bending tube portion main body 25. Alternatively, resin molding is performed so that the non-bending tube portion main body 25 is stretched. These molding methods are examples. The small pipe part 28, the pipe continuous part 29, and the large pipe part 30 may be separated and connected later. In the case of a metal, it may be formed by compression.

In addition to the above, it is possible to form the shape changing portion 23 by crushing, but in this case, since the surface area does not become small, it is slightly inferior in terms of being hardly affected by heat.

In FIG. 5, the high-voltage conductive path 16 is at least one conductive path as described above, and in the first embodiment, a high-voltage coaxial composite conductive path that is coaxial and has one configuration is adopted (the configuration of the conductive path is This is not the case.)

The single high-voltage conductive path 16 which is a high-voltage coaxial composite conductive path has a plus circuit and a minus circuit. That is, it has two systems of circuits. Specifically, a first conductive path 31 having a circular cross section located at the center of the high voltage conductive path 16, a first insulator 32 covering the outer periphery of the first conductive path 31 with a predetermined thickness, and a first insulation A second conductive path 33 provided outside the body 32, a second insulator 34 covering the outer periphery of the second conductive path 33 with a predetermined thickness, and a cylindrical electromagnetic wave closely contacting the outer surface of the second insulator 34 It includes a shield member 20 and a sheath 35 that covers the outer periphery of the electromagnetic shield member 20 with a predetermined thickness. The setting of the sheath 35 is arbitrary and may be omitted.

The electromagnetic shield member 20 is made of a known braid, metal foil, or the like, and may be arranged as follows in addition to the arrangement included in the configuration of the high-voltage conductive path 16 as described above. In other words, the second insulator 34 may be arranged so as to be somewhat buzzing.

The electromagnetic shield member 20 may be formed in a cylindrical shape and may be in close contact with the outer surface of the second insulator 34, or may be in close contact with a tape or sheet.

Regarding the conductive path (high-voltage conductive path 16), other than the high-voltage coaxial composite conductive path, a known high-voltage electric wire including a conductor and an insulator, a shielded electric wire, a cabtire cable, an insulator provided on a bus bar, etc. Is mentioned. In addition, the number should just be at least one.

In the first embodiment, the high-voltage conductive path 16 which is a high-voltage coaxial composite conductive path is two systems, but is not limited to this, and may be three systems, n systems. In other words, if the number of circuits is increased outward so that a single configuration is formed on the same axis, there are n systems.

5 that the occupation ratio of the high-voltage conductive path 16 in the small pipe portion 28 is high. It can also be seen that a sufficient contact area with the high-voltage conductive path 16 is ensured.

Referring back to FIG. 2, a retrofit component (not shown) is attached to the wire harness 9. Examples of the retrofitted parts include a clamp for attaching and fixing the wire harness 9 to a fixed object such as the vehicle underfloor 11 (see FIG. 1). Further, as a post-installation part other than the clamp, a clip, a grommet, a protector, and the like can be given.

The wire harness 9 is manufactured by inserting the high-voltage conductive path 16 that is a high-voltage coaxial composite conductive path through the exterior member 15 and then attaching the above-described post-installed parts to a predetermined position of the exterior member 15. Moreover, it manufactures by providing the well-known shield connector 19 in the wire harness terminal part 18, respectively. One shield connector 19 is a shield connector on the inverter side, and the other shield connector 19 is a shield connector on the battery side.

As described above with reference to FIGS. 1 to 5, the wire harness 9 has the shape changing portion 23 in at least a part of the exterior member 15, and the shape changing portion 23 includes the small tube portion 28 and the tubular body. The continuous part 29 and the large pipe part 30 are included. For this reason, the occupation rate of the high voltage | pressure conductive path 16 in the small pipe part 28 can be raised. As a result, the heat generated in the high-voltage conductive path 16 can be efficiently absorbed by the small tube portion 28 and the absorbed heat can be radiated from the small tube portion 28. Therefore, there is an effect that the heat dissipation effect can be enhanced as compared with the conventional case.

In addition, according to the wire harness 9, the exterior member 15 has the shape change portion 23, and therefore, if the small tube portion 28 of the shape change portion 23 is arranged in accordance with the heat source 24, the exterior member 15 and the heat source 24 There is an effect that it is possible to earn a distance, and thus it is difficult to be affected by heat from the outside.
<Embodiment 2>

Hereinafter, Embodiment 2 will be described with reference to FIG. FIG. 6 is a cross-sectional view of the wire harness according to the second embodiment. In addition, the same code | symbol is attached | subjected to the same structural member as the said Embodiment 1, and detailed description is abbreviate | omitted. Moreover, the wire harness of Embodiment 2 is wired and used similarly to the wire harness of Embodiment 1.

6, the wire harness 9 includes an exterior member 15 having an elliptical cross section and a high-voltage conductive path 51 (that is, a conductive path) that is covered and protected by the exterior member 15. The exterior member 15 of the second embodiment is different from that of the first embodiment only in the cross-sectional shape (that is, the cross-sectional shape is formed in accordance with the high-voltage conductive path 51). Omitted.

The high-voltage conductive path 51 includes two high-voltage circuits 52, an electromagnetic shield member 53 that covers the two high-voltage circuits 52, and a sheath 54 that is provided outside the electromagnetic shield member 53.

The high voltage circuit 52 is a known high voltage electric wire here, and includes a conductor 55 and an insulator 56 covering the conductor 55. The high voltage circuit 52 is formed to have a length necessary for electrical connection. The high-voltage circuit 52 is formed long because the wire harness 9 electrically connects the inverter unit 4 and the battery 5 (or the junction block 12) (see FIG. 1).

The conductor 55 is made of copper, copper alloy, aluminum, or aluminum alloy. The conductor 55 has a conductor structure in which strands are twisted together or a rod-like conductor structure having a rectangular or round cross section (for example, a conductor structure having a rectangular single core or a round single core. In this case, the wire itself May also be rod-shaped). The conductor 55 as described above is formed by extruding an insulator 56 made of an insulating resin material on the outer surface.

As the high-voltage circuit 52, a known high-voltage electric wire configuration is adopted in the second embodiment, but this is not restrictive. That is, a known bus bar provided with an insulator to form a high voltage circuit may be employed.

The electromagnetic shield member 53 is an electromagnetic shield member that collectively covers the two high-voltage circuits 52 (that is, a shield member for countermeasures against electromagnetic waves), and is a publicly known member formed by knitting many strands into a cylindrical shape. A braid is adopted. The electromagnetic shield member 53 is formed to have substantially the same length as the entire length of the two high voltage circuits 52. The electromagnetic shield member 53 is electrically connected to a shield case or the like of the inverter unit 4 (see FIG. 1) through a connection portion (not shown).

The electromagnetic shield member 53 may employ, for example, a conductive metal foil or a member including this metal foil as long as it can take countermeasures against electromagnetic waves.

The sheath 54 is formed by extruding an insulating resin material with a predetermined thickness to the outside of the electromagnetic shield member 53, and is disposed at a position to be the outermost layer of the high-voltage conductive path 51. The sheath 54 is subjected to terminal processing so that the electromagnetic shield member 53 is exposed at a predetermined length in the manufacture of the wire harness 9.

As described above, as described with reference to FIG. 6, the wire harness 9 of the second embodiment also has the same effect as that of the first embodiment. That is, the wire harness 9 including the high-voltage conductive path 51, and since the exterior member 15 formed according to the high-voltage conductive path 51 is adopted, the effect that the heat radiation effect can be enhanced by the shape changing portion 23, There is an effect that it can be made less susceptible to external heat influences.
<Embodiment 3>

Hereinafter, Embodiment 3 will be described with reference to FIG. FIG. 7 is a cross-sectional view of another example exterior member. In addition, the same code | symbol is attached | subjected to the same structural member as the said Embodiment 1, and detailed description is abbreviate | omitted. Moreover, the wire harness of Embodiment 3 is wired and used similarly to the wire harness of Embodiment 1.

7, the wire harness 9 includes an exterior member 15 having at least one shape changing portion 61 and a high-voltage conductive path 16 (that is, a conductive path) that is covered and protected by the exterior member 15.

The shape changing portion 61 is formed as a portion where the length of the outer periphery of the exterior member 15 changes, or as a portion having a large diameter and a small diameter. In order to form as such a part, the shape changing part 61 includes a small pipe part 63 having an accommodation space 62 necessary for accommodating at least the high-voltage conductive path 16, and a tubular body having one end continuous with both ends of the small pipe part 63. It has the continuous part 64 and the large pipe part 30 which has a tubular body shape which is continuous with the other end of the tubular body continuous part 64 and has a larger outer shape than the small pipe part 63.

The small pipe portion 63 is formed to have the same function as the small pipe portion 28 (see FIG. 3) of the first embodiment. In Embodiment 2, it forms in the shape partially dented in the circumferential direction. The large pipe part 30 corresponds to the non-bending pipe part body 25 itself in the non-bending pipe part 22 of the exterior member 15 as in the first embodiment.

As described above with reference to FIG. 7, the wire harness 9 of the third embodiment also has the same effect as that of the first embodiment. That is, the wire harness 9 has the shape changing portion 61 in the exterior member 15, and the shape changing portion 61 includes the small tube portion 63, the tubular body continuous portion 64, and the large tube portion 30. The occupation ratio of the road 16 can be increased. As a result, the heat generated in the high-voltage conductive path 16 can be efficiently absorbed by the small tube portion 63, and the absorbed heat can be radiated from the small tube portion 63. Therefore, the heat dissipation effect can be enhanced compared to the conventional case.

Moreover, according to the wire harness 9 of Embodiment 3, since the exterior member 15 has the shape change part 61, if the small pipe part 63 of the shape change part 61 is arrange | positioned according to the heat-generation source 24 (refer FIG. 2). In addition, the distance between the exterior member 15 and the heat source 24 can be increased, so that it is less likely to be affected by heat from the outside.
<Embodiment 4>

Hereinafter, Embodiment 4 will be described with reference to FIG. FIG. 8 is a cross-sectional view of another example exterior member. In addition, the same code | symbol is attached | subjected to the same structural member as the said Embodiment 1, and detailed description is abbreviate | omitted. Moreover, the wire harness of Embodiment 4 is wired and used similarly to the wire harness of Embodiment 1.

8, the wire harness 9 includes an exterior member 15 and a high-voltage conductive path 16 (that is, a conductive path) that is covered and protected by the exterior member 15. The exterior member 15 has a shape changing portion 71 at this terminal.

The shape changing portion 71 is formed as a portion where the outer peripheral length of the exterior member 15 changes, or as a portion having a large diameter and a small diameter. In order to form in such a part, the shape changing part 71 includes a small pipe part 28 having an accommodation space 27 necessary for accommodating at least the high-voltage conductive path 16, and a continuous tube body in which one end is continuous with the end part of the small pipe part 28. And a large tube portion 30 that is continuous with the other end of the tubular body continuous portion 29 and has a tubular shape whose outer shape is larger than that of the small tube portion 28.

As described above with reference to FIG. 8, the fourth embodiment is an example in which the shape changing unit 71 is arranged at the terminal of the exterior member 15. Of course, the wire harness 9 of the fourth embodiment also has the same effect as the first embodiment. In addition, when the shape changing portion 71 is arranged at the end of the exterior member 15 as in the fourth embodiment, the small pipe portion 28 can suppress the fluttering of the high-voltage conductive path 16 and further stabilize the pulled-out state of the high-voltage conductive path 16. The effect that it can be made is also produced.

Of course, the present invention can be variously modified without departing from the spirit of the present invention.

Below, the wire harness which concerns on embodiment is summarized.
(1) The wire harness 9 according to the embodiment includes at least one conductive path (high-voltage conductive path 16) and a tubular-shaped exterior member 15 that covers the conductive path. The exterior member 15 has a shape changing portion 23 (61, 71) at least at one place. The shape changing portion 23 (61, 71) has at least one small tube portion 28 (63) having an accommodation space 27 (62) necessary for accommodating the conductive path, and one end at the end of the small tube portion 28 (63). A continuous tube body continuous portion 29 (64), and a large tube portion 30 that is continuous with the other end of the tube body continuous portion 29 (64) and has a tube shape larger than the small tube portion 28 (63). including.
(2) In the wire harness 9 according to the embodiment, the outer peripheral surface length of the small tube portion 28 (63) of the shape changing portion 23 (61, 71) is larger than the outer peripheral surface length of the large tube portion 30. short.
(3) In the wire harness 9 according to the embodiment, the exterior member 15 is made of resin.
(4) In the wire harness 9 according to the embodiment, the exterior member 15 may be made of metal.

This application is based on a Japanese patent application filed on September 3, 2012 (Japanese Patent Application No. 2012-192779), the contents of which are incorporated herein by reference.

The wire harness according to the present invention is useful in that it can provide a wire harness that can enhance the heat dissipation effect and can be made less susceptible to external heat effects.

DESCRIPTION OF SYMBOLS 1 ... Hybrid vehicle, 2 ... Engine, 3 ... Motor unit, 4 ... Inverter unit, 5 ... Battery, 6 ... Engine room, 7 ... Car rear part, 8, 9 ... Wire harness, 10 ... Middle part, 11 ... Under vehicle floor, 12 ... Junction block, 13 ... Rear end, 14 ... Front end, 15 ... Exterior member, 16 ... High-voltage conductive path (conductive path), 17 ... Terminal, 18 ... Wire harness terminal, 19 ... Shield connector, 20 ... Electromagnetic shield member , 21 ... bent pipe part, 22 ... non-bend pipe part, 23 ... shape change part, 24 ... heat source, 25 ... non-bend pipe part body, 26 ... non-bend pipe part for underfloor, 27 ... accommodating space, 28 ... small pipe 29: Tube continuous part, 30 ... Large pipe part, 31 ... First conductive path, 32 ... First insulator, 33 ... Second conductive path, 34 ... second insulator, 35 ... sheath, 51 ... high voltage conductive path (conductive path), 52 ... high voltage circuit, 53 ... electromagnetic shield member, 54 ... sheath, 55 ... conductor, 56 ... insulator, 61 ... shape change part 62 ... accommodating space, 63 ... small pipe part, 64 ... tubular body continuous part, 71 ... shape changing part

Claims

A wire harness including at least one conductive path and a tubular-shaped exterior member covering the conductive path,
The exterior member has a shape changing portion in at least one place,
The shape changing portion includes at least a small tube portion having an accommodation space necessary for accommodating the conductive path, a continuous tube portion having one end continuous with the end portion of the small tube portion, and a continuous tube portion continuous with the other end. And a large tube portion having a tubular shape whose outer shape is larger than that of the small tube portion.
The wire harness according to claim 1, wherein the shape changing portion has a shorter outer peripheral surface length of the small tube portion than an outer peripheral surface length of the large tube portion.
The wire harness according to claim 1 or 2, wherein the exterior member is made of resin.
The wire harness according to claim 1 or 2, wherein the exterior member is made of metal.